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THT Current Sense Transformers
P0581NL / P0582NL AND P0583NL
UL/C-UL recognized components
3000Vrms gate to drive winding test
Useful operating frequency from 50kHz to 500 kHz
Most popular winding configurations
Electrical Specifications @ 25°C - Operating Temperature -40°C to +130°C
Part6
Number
Turns
Ratio
Primary Inductance
(1-10) (mH MIN)
DCR Pri
(1-10) (Ω MAX)
DCR Sec1
(3-7) (mΩ ±15%)
DCR Sec2
(4-8) (mΩ ±15%)
Hipot
(Pri-Sec) (Vrms)
P0581NL 200:1:1 76 2.8 1.7 1.7 3000
P0582NL 100:1:1 19 1.4 1.7 1.7 3000
P0583NL 50:1:1 5 0.7 1.7 1.7 3000
Additional Specifications
Part
Number
Reference Data Calculation Data
RT Ipk
(Amps)
Droop
(%)
Max Flux
Density Kb Req
(mΩ)
P0581NL 200 34 1.00 2000 17.12 .9
P0582NL 100 35 1.98 2000 68.49 .8
P0583NL 15 36 1.19 2000 273.97 .75
Notes:
1. These current sense transformers have two one turn primaries that can be
used in parallel. The listed current ratings are for parallel connection.
2. The reference values are for an application using the termination resistor
(Rt) and operating with unipolar waveform at 100kHz, 40% duty cycle.
The estimated temperature rise is 55°C.
3. The peak flux density should remain below 2100 Gauss to ensure that the
core does not saturate. Use the following formula to calculate the peak
flux density: Bpk = Kb * Ipk * Rt * don/(Ff * freq. in kHz) where: Rt is the
terminating resistor in the application and the Ff is 1 for unipolar waveform
and 2 for bipolar waveform.
4. To calculate the droop: Droop Exponent (D) = Rt * don/(Lpri in mH * Freq. in kHz
%Droop = (1-e-D ) * 100
5. The temperature rise of the component is calculated based on the total core loss
and copper loss:
A. To calculate total copper loss (W): P(cu) = Ipk2 * Req * Ff * don where Ff is 1 for
unipolar waveform and 2 for bipolar waveform
B. To calculate total core loss (W): P (core) = 0.000073 * (Freq. in kHz)1.67* (Bop in
kG)2.532 where: Bop in kG = Kb * Ipk * Rt * don/(2000 * Freq. in kHz)
C. To calculate temperature rise: Temperature Rise (C) = 60.18 * (Core Loss (W) +
Copper Loss (W)).833